Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4586307 | Prefabricated ceiling element for ceilings in buildings | Josef Rottmayr | 1986-05-06 |
| 4416099 | Compound girder forming a rigid connection for prefabricated ceiling panels | Josef Rottmayr | 1983-11-22 |